181 lines
7.4 KiB
C
181 lines
7.4 KiB
C
/* $NetBSD: rf_desc.h,v 1.1 1998/11/13 04:20:28 oster Exp $ */
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/*
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* Copyright (c) 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Mark Holland
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/*
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* :
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* Log: rf_desc.h,v
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* Revision 1.29 1996/07/22 19:52:16 jimz
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* switched node params to RF_DagParam_t, a union of
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* a 64-bit int and a void *, for better portability
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* attempted hpux port, but failed partway through for
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* lack of a single C compiler capable of compiling all
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* source files
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*
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* Revision 1.28 1996/06/07 22:49:22 jimz
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* fix up raidPtr typing
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*
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* Revision 1.27 1996/06/07 21:33:04 jimz
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* begin using consistent types for sector numbers,
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* stripe numbers, row+col numbers, recon unit numbers
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*
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* Revision 1.26 1996/06/05 18:06:02 jimz
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* Major code cleanup. The Great Renaming is now done.
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* Better modularity. Better typing. Fixed a bunch of
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* synchronization bugs. Made a lot of global stuff
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* per-desc or per-array. Removed dead code.
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*
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* Revision 1.25 1996/06/02 17:31:48 jimz
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* Moved a lot of global stuff into array structure, where it belongs.
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* Fixed up paritylogging, pss modules in this manner. Some general
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* code cleanup. Removed lots of dead code, some dead files.
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*
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* Revision 1.24 1996/05/30 11:29:41 jimz
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* Numerous bug fixes. Stripe lock release code disagreed with the taking code
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* about when stripes should be locked (I made it consistent: no parity, no lock)
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* There was a lot of extra serialization of I/Os which I've removed- a lot of
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* it was to calculate values for the cache code, which is no longer with us.
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* More types, function, macro cleanup. Added code to properly quiesce the array
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* on shutdown. Made a lot of stuff array-specific which was (bogusly) general
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* before. Fixed memory allocation, freeing bugs.
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*
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* Revision 1.23 1996/05/27 18:56:37 jimz
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* more code cleanup
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* better typing
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* compiles in all 3 environments
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*
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* Revision 1.22 1996/05/24 22:17:04 jimz
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* continue code + namespace cleanup
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* typed a bunch of flags
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*
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* Revision 1.21 1996/05/24 04:28:55 jimz
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* release cleanup ckpt
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*
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* Revision 1.20 1996/05/23 21:46:35 jimz
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* checkpoint in code cleanup (release prep)
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* lots of types, function names have been fixed
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*
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* Revision 1.19 1996/05/23 00:33:23 jimz
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* code cleanup: move all debug decls to rf_options.c, all extern
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* debug decls to rf_options.h, all debug vars preceded by rf_
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*
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* Revision 1.18 1996/05/18 19:51:34 jimz
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* major code cleanup- fix syntax, make some types consistent,
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* add prototypes, clean out dead code, et cetera
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*
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* Revision 1.17 1995/12/01 15:58:43 root
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* added copyright info
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*
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* Revision 1.16 1995/11/19 16:31:30 wvcii
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* descriptors now contain an array of dag lists as opposed to a dag header
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*
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* Revision 1.15 1995/11/07 16:24:17 wvcii
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* updated def of _AccessState
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*
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*/
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#ifndef _RF__RF_DESC_H_
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#define _RF__RF_DESC_H_
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#include "rf_archs.h"
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#include "rf_types.h"
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#include "rf_etimer.h"
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#include "rf_dag.h"
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struct RF_RaidReconDesc_s {
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RF_Raid_t *raidPtr; /* raid device descriptor */
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RF_RowCol_t row; /* row of failed disk */
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RF_RowCol_t col; /* col of failed disk */
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int state; /* how far along the reconstruction operation has gotten */
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RF_RaidDisk_t *spareDiskPtr; /* describes target disk for recon (not used in dist sparing) */
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int numDisksDone; /* the number of surviving disks that have completed their work */
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RF_RowCol_t srow; /* row ID of the spare disk (not used in dist sparing) */
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RF_RowCol_t scol; /* col ID of the spare disk (not used in dist sparing) */
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#ifdef KERNEL
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/*
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* Prevent recon from hogging CPU
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*/
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RF_Etimer_t recon_exec_timer;
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RF_uint64 reconExecTimerRunning;
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RF_uint64 reconExecTicks;
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RF_uint64 maxReconExecTicks;
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#endif /* KERNEL */
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#if RF_RECON_STATS > 0
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RF_uint64 hsStallCount; /* head sep stall count */
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RF_uint64 numReconExecDelays;
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RF_uint64 numReconEventWaits;
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#endif /* RF_RECON_STATS > 0 */
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RF_RaidReconDesc_t *next;
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};
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struct RF_RaidAccessDesc_s {
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RF_Raid_t *raidPtr; /* raid device descriptor */
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RF_IoType_t type; /* read or write */
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RF_RaidAddr_t raidAddress; /* starting address in raid address space */
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RF_SectorCount_t numBlocks; /* number of blocks (sectors) to transfer */
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RF_StripeCount_t numStripes; /* number of stripes involved in access */
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caddr_t bufPtr; /* pointer to data buffer */
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#if !defined(KERNEL) && !defined(SIMULATE)
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caddr_t obufPtr; /* real pointer to data buffer */
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#endif /* !KERNEL && !SIMULATE */
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RF_RaidAccessFlags_t flags; /* flags controlling operation */
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int state; /* index into states telling how far along the RAID operation has gotten */
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RF_AccessState_t *states; /* array of states to be run */
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int status; /* pass/fail status of the last operation */
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RF_DagList_t *dagArray; /* array of dag lists, one list per stripe */
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RF_AccessStripeMapHeader_t *asmap; /* the asm for this I/O */
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void *bp; /* buf pointer for this RAID acc. ignored outside the kernel */
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RF_DagHeader_t **paramDAG; /* allows the DAG to be returned to the caller after I/O completion */
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RF_AccessStripeMapHeader_t **paramASM; /* allows the ASM to be returned to the caller after I/O completion */
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RF_AccTraceEntry_t tracerec; /* perf monitoring information for a user access (not for dag stats) */
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void (*callbackFunc)(RF_CBParam_t); /* callback function for this I/O */
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void *callbackArg; /* arg to give to callback func */
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int tid; /* debug only, user-level only: thread id of thr that did this access */
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RF_AllocListElem_t *cleanupList; /* memory to be freed at the end of the access*/
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RF_RaidAccessDesc_t *next;
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RF_RaidAccessDesc_t *head;
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int numPending;
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RF_DECLARE_MUTEX(mutex) /* these are used to implement blocking I/O */
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RF_DECLARE_COND(cond)
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#ifdef SIMULATE
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RF_Owner_t owner;
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int async_flag;
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#endif /* SIMULATE */
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RF_Etimer_t timer; /* used for timing this access */
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};
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#endif /* !_RF__RF_DESC_H_ */
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